either: (1) a likelihood of success on the merits and the possibility of irreparable injury; or (2) that serious questions going to the merits were raised and the balance of hardships tips sharply in its favor. These two alternatives represent extremes of a single continuum, rather than two separate tests. Thus, the greater the relative hardship to the party seeking the preliminary injunction, the less probability of success must be shown.
See, e.g., Clear Channel Outdoor Inc. v. City of L.A., 340 F.3d 810, 813 (9th Cir.2003) (emphasis added and alterations and internal quotation marks omitted). In Winter, the Supreme Court definitively refuted our “possibility of irreparable injury” standard, stating “the Ninth Circuit’s ‘possibility1 standard is too lenient. Our frequently reiterated standard requires plaintiffs seeking preliminary relief to demonstrate that irreparable injury is likely in the absence of an injunction.” Winter, 129 S.Ct. at 375. The Court instructed that “[ijssuing a preliminary injunction based only on a possibility of irreparable harm is inconsistent with our characterization of injunctive relief as an extraordinary remedy that may only be awarded upon a clear showing that the plaintiff is entitled to such relief.” Id. at 375-76 (citing Mazurek v. Armstrong, 520 U.S. 968, 972, 117 S.Ct. 1865, 138 L.Ed.2d 162 (1997) (per curiam)).
Applying Winter, we have since held that, “[t]o the extent that our cases have suggested a lesser standard, they are no longer controlling, or even viable.” Am. Trucking Ass’ns, Inc. v. City of Los Angeles, 559 F.3d 1046, 1052 (9th Cir.2009) (footnote omitted). Thus, the district court’s appropriate application of our preWinter approach in granting relief is now error. The proper legal standard for preliminary injunctive relief requires a party to demonstrate “that he is likely to succeed on the merits, that he is likely to suffer irreparable harm in the absence of preliminary relief, that the balance of equities tips in his favor, and that an injunction is in the public interest.” Winter, 129 S.Ct. at 374.
1. Likelihood of Success on the Merits
The district court held that Appellees demonstrated “a likelihood of success on the merits” of their Free Exercise claim. Because this holding was based on the district court’s findings that the new rules are not neutral and generally applicable, which in turn triggered application of the strict scrutiny standard of review, it was in error. Thus, the district court’s conclusion that the new rules fail strict scrutiny review because they were neither justified by a compelling interest nor narrowly tailored constitutes an abuse of discretion. Stormans, 524 F.Supp.2d at 1264.
(a) Free Exercise Challenge
The Free Exercise Clause, applicable to the states through the Fourteenth Amendment, Cantwell v. State of Conn. 310 U.S. 296, 303, 60 S.Ct. 900, 84 L.Ed. 1213 (1940), provides that “Congress shall make no law ... prohibiting the free exercise [of religion],” U.S. Const., amend. I. The right to freely exercise one’s religion, however, “does not relieve an individual of the obligation to comply with a ‘valid and neutral law of general applicability on the ground that the law proscribes (or prescribes) conduct that his religion prescribes (or proscribes).’ ” Employment Div., Dep’t of Human Res. of Or. v. Smith, 494 U.S. 872, 879, 110 S.Ct. 1595, 108 L.Ed.2d 876 (1990) (quoting United States v. Lee, 455 U.S. 252, 263 n. 3, 102 S.Ct. 1051, 71 L.Ed.2d 127 (1982) (Stevens, J., concurring in judgment)). Under the governing standard, “a law that is neutral and of general applicability need not be justi